Piezoelectric energy harvester for river monitoring

Abstract

The invention relates to a piezoelectric energy harvester for river monitoring, and belongs to the technical field of piezoelectric power generation. The piezoelectric energy harvester is composed ofsquare magnets, piezoelectric vibrators, a supporting column, sealing boxes, circular magnets, screws, a bluff body and an elastic beam, wherein the upper and lower portions of the support column arerespectively connected with one sealing box, the middle of the supporting column is connected with one elastic beam, the elastic beam is vertically installed on the supporting column and is integrallyin an E shape after being installed, the far end of the elastic beam is connected with the turbulent flow bluff body, the bluff body is formed by splicing two semi-cylinders and fastened to the elastic beam through screws, the position of the bluff body on the elastic beam can be adjusted so as to change excitation force and excitation frequency, the circular magnets are mounted on the two sidesof the bluff body, the piezoelectric vibrators and the square magnets are symmetrically installed in the sealing boxes, when fluid flows through the bluff body, the bluff body generates self-excited vibration under the action of the fluid, and the square magnets on the piezoelectric vibrators in the sealing box drive the piezoelectric vibrators to vibrate under the action of magnetic coupling, sothat piezoelectric power generation is carried out.

Description

technical field [0001] The invention specifically relates to a piezoelectric energy harvester for river monitoring, which is used for collecting water flow energy and belongs to the technical field of piezoelectric power generation. Background technique [0002] There are thousands of rivers in our country. In recent years, due to insufficient treatment of industrial waste water, soil erosion and improper use of pesticides and fertilizers, many rivers have been polluted. In addition, the flood control facilities of small and medium-sized rivers in many areas are not perfect, and when the flood season comes, it may cause dangers such as embankment collapse or flooding. Domestic experts and scholars have also proposed corresponding detection methods and means, including water quality monitoring technology for river water pollution, rainfall, water level and river flow speed monitoring technology for flood control and natural disasters such as mudslides. Although some monitor...

AI Technical Summary

Problems solved by technology

Although some of the monitoring methods currently proposed are relatively mature at the technical level, they have not been popularized and applied on a large scale. One of the main reasons is that the power supply problem of the monitoring system has not been well resolved.

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